What favor has the Holy Quran done to humanity by way of teaching the highest moral?

What favor has the Holy Quran done to humanity by way of teaching the highest moral?

It is a bounty of the Holy Quran upon mankind that it has set forth the distinction between man's natural State and moral qualities. And that it does not stop merely at leading man from his natural conditions to the elevated palace of high moral qualities? But also opens the doors of the holy understanding that leads man to the spiritual heights. In this way it sets forth in an excellent manner the three types of teaching that we have already mentioned. As it comprehends all the teachings which are necessary for religious training, it claims it has discharged this function to perfection. It says:

This day have I perfected your religion for your benefit, and have completed My favour unto you and have been pleased to appoint Islam as your religion (5:4). This means the climax of religion has been reached in Islam. Which is that a person should be committed wholly to God and should seek his salvation through the Sacrifice of his self in the cause of God, and not through any other means, and should demonstrate this motive and determination in his conduct.

This is the stage at which all excellences arrive at their perfection. Thus, The Holy Quran has presented the God Who was not identified by the philosophers.